# What is the domain of #f(x)=secx#?

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The domain of ( f(x) = \sec(x) ) is all real numbers except where ( \cos(x) = 0 ), because division by zero is undefined. Therefore, the domain is ( x ) such that ( x \neq (2n + 1)\frac{\pi}{2} ), where ( n ) is an integer.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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